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attempt non-atomic update for gallery ordering

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byte[] 2020-03-29 23:04:30 -04:00
parent 723bfa213f
commit bd401cf967
1 changed files with 16 additions and 8 deletions
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24
lib/philomena/galleries.ex
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@ -255,21 +255,29 @@ defmodule Philomena.Galleries do
[ [
[ [
id: interaction.id, id: interaction.id,
gallery_id: interaction.gallery_id,
image_id: interaction.image_id,
position: interaction_positions[new_index] position: interaction_positions[new_index]
] ]
] ]
end end
end) end)
changes
|> Enum.map(fn change ->
id = Keyword.fetch!(change, :id)
change = Keyword.delete(change, :id)
Interaction
|> where([i], i.id == ^id)
|> Repo.update_all(set: change)
end)
# Do the update in a single statement # Do the update in a single statement
Repo.insert_all( # Repo.insert_all(
Interaction, # Interaction,
changes, # changes,
on_conflict: {:replace, [:position]}, # on_conflict: {:replace, [:position]},
conflict_target: [:id] # conflict_target: [:id]
) # )
# Now update all the associated images # Now update all the associated images
Images.reindex_images(Map.keys(requested)) Images.reindex_images(Map.keys(requested))